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Los "felices años veinte"
EduBook Organización
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1.1. Estados Unidos, primera potencia mundial Mientras los países europeos participantes en la Primera Guerra Mundial sufrieron una grave crisis económica como consecuencia del conflicto, Estados…
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Final Autoevaluation T07 01 - Energy inside the Earth
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Answer true or false: The Earth's interior is hotter than the surface. Tectonic plates are about 100 meters thick. Most tectonic plates have continental and oceanic parts. The most active areas of…
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Learn. Simple machines - Obtaining and using energy
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Simple machines The most rudimentary machines are called simple machines. They are basic, but they are of great help in performing tasks and transferring energy. The Wheel A wheel is a circular object…
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Think about it. Heat and temperature
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Remember what you have studied in this section and answer the questions: What two physical phenomena are used to calibrate a thermometer and why? Why do we also use the name centigrade for the Celsius…
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Light, shadow and penumbra
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3.1. Linear propagation of light Light is an electromagnetic wave that propagates in a straight line in all directions. Each of the directions that light propagates in is called a ray. This phenomenon…
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Enlightenment principles
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Natural or moral equality is based on the constitution of human nature common to all men, who are born, grow, live and die in the same way. The first state that man acquires in nature, and that is…
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Look. French cartoon
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Look at the cartoon and answer the questions: Analyse the cartoon with a partner. The figure on the left is creating an 'electrical spark': What does the spark represent? Which monarchs are…
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True/false. Steam transport
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Are the following statements about steam transport true or false?: By the start of the 19th century, railways with steam driven trains had been perfected. In 1829, James Watt invented the steam train.…
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The Second World War
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6.1. The causes of the conflict Fascist Italy and Nazi Germany initiated an expansionist policy to enlarge their territories: they strengthened their armies, introduced militarism and provoked an arms…
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Living conditions in the camps
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The prisoners were used to build and enlarge the camp, though they also had to do agricultural, mining and industrial work. (…) All they were given to eat was soup (...). After their work was over…
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